Mantle of molds for casting stereotype plates



Patented May 8, 1928. f i v UNITED STATES PATENT OFFICE.

CARL WIN KLER J OE BERN, SWITZERLAND. I V MANTBLE OF MOLDS FOB, CASTING STEREOTYPE PLATES. Application filed Februar 's, 1527. serial No. 166.223. i In casting stereotype plates the mantle matrix in the usual way. Behind this wall of the mold very frequently gapes somewhat a is provided the deep hollow chamber Z),

under theinfluence of the heat of the molten which contains air, or any insulating sub- 40 metal flowing into the mold. This distorst-ance'and is provided with openings Z) for I 5 tion cannot be properly prevented by simply the circulation of air or other substance cooling the mantle by water passing through therethrough, and the back 0 of the mantle a hollow chamber behind the wall on which is provided with a water chamber d. Water the matrix lies, because the mantle must enters this chamber atone point, for examhave a certain temperature, in order to ple, at e, and leaves at another point, such '10 obtain good'plates. It has been suggested as f. v

to provide an insulating air chamber be- The connecting rods for moving the tween said wall and the water mantle, and, mantle are attached to projecting lugs g, h. by so doing, better results are obtained, hat I claim and desire to secure by although the quantity of water required is Letters Patent of the United States is:

15 excessive. By the present invention this '1. A mantle fora mold for casting stereoidea is further developed by making the type plates, having an air chamber occupymantle with a chamber behind said wall so ing the greater part of the inside of the mana deep that it occupies the greater part of the tle behind the wall carrying the matrix, inside of the mantle, and by providing the with a water cooling chamber for the back 20 back of the mantle with a relatively thin wall, substantiallyas, and for the purpose,

water chamber. .set forth.

By thus cooling the back of the mantle, 2. A mantle for a mold for cooling stereoinstead of the wall carrying the matrix, type plates, having an air chamber occupythe back otters a greater resistance to the ing the greater part of the inside of the 26 gaping of the mold, and better plates are mantle behind the wall carrying the matrix, obtained, which is of particular importance with a water cooling chamber for the back when the plates are used for printing withwall, and. lugs for attaching the operating out being first bored. Further, the thin geaijsubstantially as set forth; I 5 water mantle enables coldwater to be rushed 3. In a mold for casting stereotype plates,

30 through without requiring an excessive a mantle having a comparatively large air quantity. V chamber in rear of the Wall carrying the In the'drawing illustrating my invention matrix and a comparatively shallow water by way of example. 1 chamber between the air chamber and back 7 Fig. 1 shows a cross section of such a wall of the mantle.

mold mantle, and Fig. 2 a longitudinal sec- In testimony whereof I have signed my tion ofsameon'A- B in Fig. '1. name to this specification.

The wall a of this mantle carries the CARL VVINKLER. 

